Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee9cc72351360b1…

MALICIOUS

PDF

86.0 KB Created: 2021-06-26 01:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dea68feef1273e22a588d536798e3a16 SHA-1: 2818de8ad845275479c527f7248d3e0beacb6502 SHA-256: 0ee9cc72351360b12c9d1290a5b17e77be61d09f885e48814ba17e614eb49777
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to malicious sites, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cructi.ru/uplcv?utm_term=famous+quotes+about+college
    • http://megat.pl/uploaded/fck_files/file/zurid.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32891a635b---dijinewaxikagutib.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/c4d3725fd944507a3a33a4127ceae55e/97704500560.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//bodogigek.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c77e48b84---83825094764.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/2933555e72f7d573a0dcd8003e4ec8d3/86875043250.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081469aa3a2e---dedufef.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094c2b411ed4---17389355695.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/fad74d80528f6c03073dbb0cfd381876/bizupaja.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/e57fb7a82bd90e051b4492d1311354dc/nagevipesogowa.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f66add9ee---fujomamisapa.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/qvssrae8jroi3jp5j5jkh9tpg4/52688757478.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/4m55khsq7v27ggtahl0n7tu1pv/79398069411.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/idirr2npoem5u6t65i5qetjbe2/jadugebemaluxi.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/b12f483c752bb906ae9544f7d5b8ebae/wevosigogopewovipirux.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/44c7967bd22e58585dde285c884964f0/jopovifidegesapu.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f75786039d---32945145549.pdf
    • http://ventilatoryzlin.cz/images/file/86525052985.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/a4s47tdl95mqcnbe87f24v5pb9/xumezobitoxug.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/4420bea85a1e6ebbffc670cdeedcbf93/fikemifegesasudid.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/5f15615f8ef90a1a7e60fa593f851200/dasuxonagulow.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609273e4d07b0---siraburilikazibawo.pdf
    • http://indovinandoilmondo.it/themes/userfiles//files/jasibegoxajara.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087fb3f6d6d9---nuwovajupejupud.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee8d.bin
d9106078fa1587239261c6538a0f9fc51bf786110aef56e642ec0685b5abb454
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8D 10640 bytes
font_01_sfnt_off000106b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106B3 16792 bytes
font_02_sfnt_off00011ec5.bin
ea6b3760556d18240fb0c4013d7455a983f6a0f61afe981c7bb3a744ad20af54
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC5 17024 bytes